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If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)?

If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)?
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4 votes
If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)?

asked
User Irma
by
7.4k points

1 Answer

5 votes
F(x) = -x² + 4
g(x) = 6x

(g - f)(3) = 6(3) - (-(3)² + 4)
(g - f)(3) = 18 - (-9 + 4)
(g - f)(3) = 18 - (-5)
(g - f)(3) = 18 + 5
(g - f)(3) = 23

answered
User Clement Dungler
by
8.0k points
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